JSFiddle - React, Tailwind, and code Playground

by pleinx

HTML

<button>
  Test
</button>

JavaScript

class MyClass {
	sayHello() {
  	alert("Hello!");
  }
}

const myClass = new MyClass();

document.querySelector('button').myclass = myClass;

document.querySelector('button').addEventListener('click', (e) => e.target.say());